Toshiba also extended its industry leadership in memory card solutions by unveiling the world’s first 4GB, 8GB and 16GB microSDHC UHS-I cards compliant with (SD 3.0), UHS50. Mass production of the new SDHC UHS-I cards and sample shipments of the new microSDHC UHS-I cards will start this November.

The new SDHC UHS-I Memory Cards are the world’s first memory cards compliant with SD 3.0, UHS104. With a maximum read speed of 95 MB/s, and a write speed of 80MB per second, the products introduce a new level of ultra-fast read and write speeds to NAND flash based memory cards.

Toshiba’s new microSDHC UHS-I cards are the world’s first microSDHC memory cards compliant with SD 3.0, UHS50. They, too, offer the world’s fastest read and write speeds in their class: a maximum read speed of 40 MB/s and a write speed of 20 MB/s.

The specifications of the new cards combine increased data capacity with the fast data transfer rates essential for applications such as high speed continuous shooting of high resolution digital still cameras, video, and high speed transfers of HD content. The high performance specifications announced by Toshiba will enable developers to use HD content in future generations of consumer products. By further enhancing the performance of its SD Memory Card line-up, Toshiba continues to lead the NAND flash memory market in removable card storage.

The expanded new card series will be featured at IFA 2010, in Berlin, Germany from September 3, and PHOTOKINA 2010, in Koln, Germany from September 21.

It's not entirely true. From what you wrote it only has fastest read speeds.
SanDisk Extreme III SDHC Class 10 has max 30MB/s read write speeds.
I have one of those babies in my EOS 550D and it really is blazing fast